The vamp was a girl, tiny, so short I thought she was really young, but she must have been 17 or 18 from her face and the smile. "Oh, that's wicked," she said.

"What did I say?"

"Endgame: when the cops order us to disperse, pretend you've been gassed. Pass it on. What did I just say?"

"Right," I said. "Pass it on."

She melted into the crowd. I grabbed another vamp. I passed it on. He went off to pass it on.

Somewhere in the crowd, I knew Ange was doing this too. Somewhere in the crowd, there might be infiltrators, fake Xnetters, but what could they do with this knowledge? It's not like the cops had a choice. They were going to order us to disperse. That was guaranteed.

I had to get to Ange. The plan was to meet at the Founder's Statue in the Plaza, but reaching it was going to be hard. The crowd wasn't moving anymore, it was surging, like the mob had in the way down to the BART station on the day the bombs went off. I struggled to make my way through it just as the PA underneath the helicopter switched on.

"THIS IS THE DEPARTMENT OF HOMELAND SECURITY. YOU ARE ORDERED TO DISPERSE IMMEDIATELY."

Around me, hundreds of vamps fell to the ground, clutching their throats, clawing at their eyes, gasping for breath. It was easy to fake being gassed, we'd all had plenty of time to study the footage of the partiers in Mission Dolores Park going down under the pepper-spray clouds.

"DISPERSE IMMEDIATELY."